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New sulfonic acid ion-exchange resins for the preesterification of different oils and fats with high content of free fatty acids

Paper ID Volume ID Publish Year Pages File Format Full-Text
42686 45937 2009 11 PDF Available
Title
New sulfonic acid ion-exchange resins for the preesterification of different oils and fats with high content of free fatty acids
Abstract

The preesterification of free fatty acid (FFA) containing vegetable oils by strong acid ion-exchange resins was studied. The catalysts were characterized by scanning electron microscopy (SEM) and ion-exchange capacity. Based on a simple kinetic model the rate constants were determined. The effect of the catalyst structure, particle size, stirring speed, oil properties and water removal method on the reaction rate was investigated. Calculation of the turn over frequencies (TOFs) revealed high catalyst activities. Excellent conversions were obtained even without water removal, due to an extractive esterification. During recycling durability tests a catalyst activity loss occurred. The deactivation mechanism was investigated and the exhausted catalysts were successfully regenerated. A catalyst fouling was not observed. The presented preesterification process facilitates the processing of low quality, high FFA containing oils to biodiesel via basic transesterification and might help to reduce the production costs.

Graphical abstractThe preesterification of free fatty acid (FFA) containing vegetable oils by strong acid ion-exchange resins was studied. The effect of the catalyst structure, oil properties and water removal method on the reaction rate was determined. During recycling durability tests a catalyst activity loss occurred. The deactivation mechanism was investigated and the exhausted catalysts were successfully regenerated.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Biodiesel; Free fatty acids; Esterification; Ion-exchange; Heterogeneous catalysis
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New sulfonic acid ion-exchange resins for the preesterification of different oils and fats with high content of free fatty acids
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 362, Issues 1–2, 30 June 2009, Pages 47–57
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us